

//提供三个锁.分别控制
public class Demo {

    private static Object locker1 = new Object();

    private static Object locker2 = new Object();

    private static Object locker3 = new Object();

 

    public static void main(String[] args) throws InterruptedException {

        Thread t1 = new Thread(() -> {

            try {

                for (int i = 0; i < 10; i++) {

                    synchronized (locker1) {

                        locker1.wait();

                    }

                    System.out.print("A");

                    synchronized (locker2) {

                        locker2.notify();

                    }

                }

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

        });

        Thread t2 = new Thread(() -> {

            try {

                for (int i = 0; i < 10; i++) {

                    synchronized (locker2) {

                        locker2.wait();

                    }

                    System.out.print("B");

                    synchronized (locker3) {

                        locker3.notify();

                    }

                }

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

        });

 

        Thread t3 = new Thread(() -> {

            try {

                for (int i = 0; i < 10; i++) {

                    synchronized (locker3) {

                        locker3.wait();

                    }

                    System.out.println("C");

                    synchronized (locker1) {

                        locker1.notify();

                    }

                }

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

        });

        t1.start();

        t2.start();

        t3.start();

 

        Thread.sleep(1000);

 

        // 从线程 t1 启动

        synchronized (locker1) {

            locker1.notify();

        }

    }

}

 

 